Pneumatic surfacing-machine.



G. L. BADGER. PNEUMATIC SURFAGING MACHINE,

'APPLIOATION FILED APBQSD, 1906. 906350. Patented Dec, 15, 1908. 4 SHEETS-SHEET 1.

Patented Dec. 15 1908 G L BADGER APPLIOA'HOI rILnn APR so 1906 4 SHEETS-SHEET 3 //w r q /4.? o

v e r G. L. BADGER.

v PNEUMATIC sunmcme MACHINE.

APP LIOATION IIFED APB. 30, 1906. Dec.

4 SHEETS-SHEET 4 no weight on the working too.

the rearward the cylinder with relation to the d eslred p is no.

T OFFICE.

GEORGE L. BADGER, OF QUINCY, MASSACHUSETTS.

PNEUMATIC SURFACING MACHINE.

Specification of Letters Patent.

Patented Dec. 15, 1008.

To all whor r i'tlmay concern:

' Be 'it known that I, GEORGE L. BADGER. citizen of the United States, residin at Quiney, in the county of Norfolk and State 'ss's a'chusetts, have invented a certain newand useful Improvement in Pneumatic Surfacing-Machines, of which the following is a specification, reference b eing had therein to the accompanying drawings.

Y This invention relates to machines for dressing stone by a pneumatic impact tool which is held in a movable arm or frame that maybe 'ided on the surface of the stone.

The ell 6cm of the invention are to provide a light portable machine which may be easily moved to difierent stones; to combine a light powerful impact tool to dress st ne quickly, with a light frame on which is mounted, and which may readily be moved over the surface of a stone; to furnish means fordressing stone of irregular shape, curved surfaces and varying planes, without resetting the stone or ehangin the adjustment of the machine for the di erent surfaces; to'

maintain the working tool perpendicular the surfacev of the work when desired; to

maintain a constant pressure on the working tool when in contact with the work; to retain the working tofol in position to receive the most effective piston impact; to raise the. machine to different levels when in operation. without displacement of the working-tool, and other novel. features which will. herein after he set forth. 4

In surfacing machines commonly used, it is the custom to zontally parallel to the plane of the desired surface, toward and away from a standard or support, and to rotate about the same. The

wei ht of the traveling arm or the carrier and ort, there is The tool carrier 18 raised and lowered with relatioirto the standard and the surface of the work by a Windlass, or wiru'rh, which also determines position of the 'warking lool in too being sustained by the sup The working tool is free to move longitudinally with relation to the cylinder, and when said working tool is moved to cut on the higher portions of the rough surface, it projects further int the cylinder, and not m position to receive the most eil'mtive 1min pact blow, unless the vertical adjustment of the tool carrier is changed; and lhetllimency 1 )ection,

' rovide a traveling. tool holder or carrier w neh is free to move horn limited to plane Surfaces, and in order to of the'machine depends largely on the jud ment of the o erator in maintaining the ad justment of t is tool carrier with relation to the work.

When the adjustment is fixed to allow the machine to work to the best advantage on the higher portions of the r01 5h surface, the

variation of the surface often permits the working tool to drop so far that the piston strikes the head of the cylinder instead of striking the working tool, and this is a source of frequent breakage of parts despite their being rn'--:le heavy and strong to withstand this frequent concussion. It has heretofore been deemed necessary to allow the working tool to rebound freely from the work, in order that the cutting face of the work tool might mount the high places or projections from the lower plane on the rough surface of the stone.

In some cases the working tool is provided with a shoulder .to prevent itprojecting too far into the cylinder, but when the machine is in operati n, the weight of the tool and tool carrier is not on the working tool, the weight being counterbalanced, so that the tool can more rearward with relation to the working tool to allow the latter to rebound freely from the work. If the weight of the tool and tool carrier bears on the shoulder of the working tool, the body of the latter must be made larger than would otherwise be necessary to provide a shoulder of sufiicient proand in order to revent rapid wear the shoulder should be hardened andis very apt to break off at this point.

The use of surfacing machines isgenerally dress stone such as bases, which have-thebed and washers lyin in different planes, it is necessary to set sue stoneto five different levels to dress the same.

A large proportion of the stone manufactin ed are surfaced by hand, and might advantageously be dressed by a portable machine that con (1 be brought to the stone, having its movements under the immediate control of l the operator to dress a variety of plane and curved surfaces and moldings and widen the range of machine work.

This invention rovides means Whereb when the machine is in operation, the weig 't' of the tool and'the outer end of the tool carrying arm, and any additional tension desired, may bear upon the working tool to keep it in. contact with the work; and to maintain the rear end of the working tool at the proper distance with relation to the cylinder to receive the most effective blow of thepiston. The Workingtool does not require a shoulder and may )0, formed from square or round stock of practically the same size as the shank with a slight allowance for turning the shank, the end of which is tapered and hardened to form a stop, so that the body of the shank has no tendency to break or jump oil.

The construction of the standard or support may be light, since it is not required to support the Weight of the tool carrying arm, except when. the machine is not in use, and.

i then the arm and tool can. be moved close to the sup ort, and the weight will be practi cally ba anced on the support.

The arm is pivoted on the support, permitting a wide range of vertical. movement without changing the vertical adjustment on the su port, and the arm is free to move tOWBIQl S and away from and to rot. te about the sup ort, thus having a universa. motion ada' te for surfacing a variety of stone, Wit out strain or inconvenience to the oper ator. The end of the arm tovihich the inrpact tool is fastened is also provided with universal jpints, which are directly under the control of th'operator, permitting the Working tool to--b'e' maintained perpendicular to surfaces ofirregular form and difierent levels and plane's,- without stopping the lifting han operation of the machinc, or changing the adjustment of .th'e 'ar'm on the support or the setting of the stone.

A pressure ontlie' guiding handle towards the work starts the machine and when the handle is released the air supply is shut off. A'piv'oted lifting handle serves to gri the working tool so that the arm may be ifted without dis lacing the working tool, and the dle also serves to maintain the working tool for bus the stone in alinement with any desired ace.

- The heads of'the im iact tool are flexibly secured to the cylinder )y bolts under spring tension, so that-when the piston strikes the heads the springs relieve the concussion and prevent injury to the tool.

'When' the shank of the working tool is grip ed by the. lifting handle, and clamped to t eheadto ermit the working tool to be moved to a big er level while the machine is in o eration, the blow of the iston on the wor g tool is cushioned by t e springs on the clamp bolts-and greatly relieves the jar to the operator;

The. invention will now be fully described,

reterssrse had to arecnipanymg' drawings, and the novel ,teatures wil be particularly'pointed out in the claims at the end of the specification. I

' In the drawings,Figure *1 is an elevation of the apparatus embodying theiiinvention.

gripping the sleeve 7.

.hoisti'ng Fig. 2 is a planyiew partly in section. Fig. 3 is a sectional detail showing the work tool in its rearward position. Fig. 4- is a view of a stone as prepared to be dressed by the machine. Fig. 5 is a sectional detail on. line 5---5 of Fig. l, to show the throttle valve. Fig. 6 is a sectional detail on line 6---6 of Fig. 2 showing the ratchet on the opposite end of the winch from that shown in l ig. 1 Fig. 7 is a detail elevation of one of the swivel heads showing the curved swivels lot. Fig. 8 is an elevation partly in section of the impacttool with piston and other parts removed. Fig. 9 is a section through the standard and pivoted. arms. Fig. 10 is a sectional view of the swivel sheave. Fig. 11 is an. elevation of sleeve or saddle showing the eccentric stop, pinion and lever. Fig. 12 is a plan view of the lower clamp plate for the impacttool, showing the curved swivel slot.

The apparatus comprises a pneumatic impact tool which is mounted on an arm. that is free to move in all directions. The impact tool has a cylinder 1, Fig. 3, and Fig. 8, a piston 1, an upper head 2, a valve casing 2*, a lower head 3, a working tool 4, a bushing 5, a

stop ring 6, a sleeve 7, clantp platesS and 9,

clamp bolts 10 and 11, an springs 12, 13.

8, which bears against the lower head 3. The bolt 11 passes through the sleeve 7. The heads 2 and 3'are clamped by the bolts 10, 11, under s )ri'ng tension to the cylinder 1, a slight c earance being rovided to prevent ft the working tool is not in position against the work and the piston strikes the lower head 3, the springs 12, 13, permit the head. 3 to move, and relieve the strain on' the heads and clamp bolts 10, 11

I The sleeve 7', supporting the impact tool, is held in pivoted bearings by screws 14?, min the arms 15*, 15 of the swivel plate 16. The plate 16 is recessed into and may turn in the head 17. A stud 18 fastened to the head 17 passes throu h a circular or arc-shaped slot- (see Fig. 7) in the plate 16 having a nut 18 which may be screwed against plate 16 to clamp the swivel in any desired position.

When the d against the head .17 by means of the bolt '19 and spring 20 under spring ten sion but free to swivel. The head 171s rovided. with two guide arms21, 21 ,.which slide freely in the guide tubes 22, 22*, and the Whole forms a swiveling tool carrjting arm, which by means of the swivel guide supports 23, 23 and bearing studs 23, 23 is secured to the saddle 24. The saddle 241s rotatabiy mounted on the sleeve 25, between the shoulder 25* of the sleeve 25 and the re taining collar 26. The set screw 28 serves to clamp the sleeve 25 to the su port 27. The

winch 29 is secured to the guide tubes 22, 22 Thev hoisting rope 29 is fascoasts tened at one end to the saddle 24 as by a hook 24*, thence passing over the swivel sheave 0 at the top of the support 27 havinga swivel sheave support 27*, thence passes down and is wound-several turns around the drum of the winch, and the other end of th rope is fastened to the spring 31 which is also attached to the hook 32 of the swivel collar 32 at the base of support 27. \The winch 29 has ratchets 33, 34, on opposite sides of the winch, having teeth out in opposite directions, and havingengaging pawls 33 34. VVh'en the sleeve 25 is clamped to the support 27'and the pawls are disengaged, the winch turns freely on the rope and the arms are free to swivel in the saddle 24, and when the work tool is in position and upon the stone, the

weight of the arm will rest upon the work tool which may however be moved freely in any direction to follow the inequalities or any de sired angles of the surface.

To lock the arms to any angle, the pawl 33 is thrown into engagement with the ratchet 33. To increase the weight upon the work tool, the pawl 33 is disengaged, and pawl 34 is thrown into engagement with ratchet 34, and the winch turned to stretch the spring 31, and thereby increase the tension on the arms and work tool. This leaves some slack rope above the winch so that the arm is free to move down and it may be moved up againstthe spring tension. One or several weights similar .to 27 may be placed on the base of the support 27 so that it may support any weight or tension which may be put on the arms to hold the tool to the work. When the weight'of the arm is restingon the work, the sleeve 25 maybe raised or lowered on. the sup port 27 by disengaging the proper pawls and turning the winch in the desired direction.

When the machine is not in use, the head 17 is moved as close to support 27 as possible, and pawl 33", being throvm into engagement with. ratchet 33, retains the arms at any desiredangle. This angle may be maintained in raising or lowering the saddle on the support. 27 by the initial location of the winch 29 on the guide tubes 22, 22 to balance the load when the head 17 moved close to the support 27. 'By clamping the sleeve 25 to the support 27., the arms may hemeised or lowered by the winch 29 to any desired angle with thesupport 27.

The sleeve 7 mounted on the cylinder 1 of the impacttool has attached thereto a guiding handle 35 for guiding the tool. on the work, A liftinghandle 36 pivoted at 36 is provided with a hook 36 which is in proxim ity to the shank of the working tool 4 and is normally kept from contact with the shank and against the bushing 5. by means of the a spring 37 which also bears against the guidwlng handle 35 and normally keeps said handle against the stop 35" on the handle 3t lifted, h

e sleeve 7.

l 1 l l l l i 1 i ed, has a nut 36 fitted tightly support 36 in which the handle 36 is join to su port 36* and is free to turn in the plate 8 in t is curved 7 slot 36 and the supporting bearing 36 is free to turn on the bushing 5. A portion of the shank of the working tools used for bushing or finishing surfaces may be made square as shown at 45*- (Fig. 3) to fit loosely in the hook 36".

In bushing surfaces it is not necessary to lift the tool or arm, and the spring 37 may he disengaged from the guiding handle 35 and the handle 36 with the support 36 may he turned to any desired position in the slot 36 of plate 8 so as to maintain the tool marks on the surface in alinement. dle 35 is connected with a vertical bell crank lever 35 pivoted at 35 (see Fig. 8), the longer arm of which passes through. an elongated slot 35 in the arm 35 of a horizontal bell crank lever which swings on the pivot 38 v the pivot support 38 being fixed to the plate 9. The arm 35 is adjacent to the end of a throttle valve 39 in the head of the cylinder which normally is closed by fluid pressure. When the handle 35 is pressed down against the stop. 55 the lever 35, engaging the horizontal bellcrank arm 35 forces the arm 35 against the end of the throttle valve 39, and

opensthesame to admit fluid pressure to the c'dinder. The hose nipple 40 is connected with a source of fluid pressure supply (not shown), and to the head of the cylinder, the

fluid ressure serving normally to close ti .e thrott e valve. When the pressure on the guiding handle 35 is removed, the spring 37 moves the said handle up, and the bell crank arm 35 is moved away from the cylinder and allows the fiuid pressure to close the throttle valve and stop the operation of the machine.

The stop 35* is eccentrically mounted in bearings on the sleeve 7, and may be turned by the lever 35 to regulate the forward movement of the guiding handle 35 and maintain the throttle valve open more or less to control the power of the impact tool for the varying conditions of the work, and enable the operator to work close to the edges and corners of the stone, without danger of trolled therefrom, it is thereby immaterial whatportion of the handle is graspedandthe throttle valve is controlled by the natural The guiding han- 1 movement of the operator to. press the-tool to i the work by the handle to start the machine and to stop the machine by releasing the the handle 35 awa from the stop .35", thus handle.

When the spring 37 is in its normal posi- .tion on the handles 35 and 36, and the handle 35 is pressed down against the stop 35 to maintain the eration of the machine, the

handle 36 maye lifted up by the operator by gripping bothv handles, without moving ermitting the wor tool 4 and the arm to lifted together without stopping the 0 eration of the machine, and the blow of tlie a piston, either on the head or on the working tool, when thesame is clamped to the head,

is relieved bylthe 8 rings 12, 13, thus easing the concussion'to t e tool and the operator.

This is an important feature in machines of i this class, wherein the working tool is free to to a much widerrange of wor The universal joints at the outerend of the arm permit the impact-tool to swivel in.

drop from i111 act-tool when not in contact withthe W0! and ada' ts the machine either directioneither laterally .or forward and backward with-relation to the arm. By adjusting the swivel plate 16 and clamping the same to the head 17, the work tool may the work tool be maintained at a lateral angle to the arm and when not clamped thereto, the adjustment of the nut bearing on the spring 20 creates a friction swivel of any desired tension, which can he swiveled hy the how shaped guiding handle laterally to change the angle of the tool holder and maintain perpendicular to a curved surface; j

The rotation of hand wheel 41 turns the shaft 41 in hearings 7 on the sleeve 7 and the worm 42, which is fast to the shaft 41?, engages the segment of a gear as shown on the su port15, permitting the operator,

while 't 'e machine is in. operation, to swivel thesleeve 7 on the bearing screws 14 14*,

either forward or backward, and the worm.

serves to lock the ,swivel at all times, and maintain the tool. at a desired forward or rearward angle to the arm.

A stop ring 6 slides longitudinally in the lower head 3, being retained by the bushing 5 which is a tight drivingfit in the head. The end of theworking tool 4 is tapered to fit a tapered hole in the stop ring, and when. the working tool is on the work and the tool carrying arm is lowered, the tapered end of the shank engages the stop ring and forces it against the shoulder 3 formed in the head, thus limiting the rearward movement of the working tool and retaining it in alinement with the piston. The stop ring is free to move out of the path. of the piston, there being sufficient play provided between the 4 bushing 5 and the stop ring to permit the piston to strike on the end 3" of the head 3, and to prevent the end of the-piston str king the stop ring when it'is against the bushing 5 and displacing the same. Therei'is a certain provides means for maintaining the working tool in a fixed rearward position with relation to the cylinder when the machine is in operation. 1f, however, the .machine is started when the work tool is not in the head, or is notv resting on the work, or is not-properly seated for any cause, the piston W'lll' strike the headyand in order to prevent breakage and injury to the tool, the sliding heads 2 and 3 are retained against the cylinder by spring ressure, and any pounding on the heads is re 'eved by the springs 12, 13-, as described, and the tool as a whole mayflzbe much lighter in construction than tools in which norelief is provided for. such concussion. The adaptability of the invention for surfacing stone is illustrated by the sketche'sof stone in Fig. 1 and Fig. 4, the stone 45 in Fig. 1 having curved surfaces and the stone 16 in Fig. 4 having five plane surfaces of different angles all of wh ch may be dressed without resetting of the stone or stopping the machine except to change working too is. It may also he used to advantage in roughing and finishing many forms of molding.

I claim as myinvention: .1. In apparatus of the character described, a support, a toolcarrier vertically adjustable on the support, an impact-tool mounted on the tool-carrier, means whereby the tool carrier is free to move longitudinally with relation to the support, said means being adapted to maintain the tool-carrier in fixed angular relation to a vertical plane passing longitudinally through the tool-carrier, means for vertically adjusting the tool-carrier on the'sup ort-and means independent of said vertical y adjusting means whereby the tool may be moved to and from the work in a vertical. plane. i v

' 2. In apparatus of the character described; a support, a tool-carrier vertically adjust able on'the support, an impact-too1 mounted on the tool-carrier, means whereby the tool is to move toward and from the'support, said means being adapted to maintain the tool-carrier in fixed angular relation to a vertical plane passing longitudinally through the toolcarrier, means for vertically ad ustin the tool-carrier on the support and means in .ependent of said vertically adjusting means whereby the tool may he moved to and from the work in. a vertical'plane.

I 3. In apparatus of the character described, a pneumatic impacttool, a working-tool, an arm to which said impact-tool-is secured, a support onwhich said arm is mounted,

' a support, a tool-carrier wertically adjustecasao and movable longitudinally withrelation to said support, means whereby in dressing the horizontal surface ,of a stone, the inclinaparallel to the said surface and means wherey the working-tool may be moved in horizontal plane independent of any move mentof the support or the angle thereof -with relation to the work.

4. In apparatus of the character described,

able on the support, an impact-tool mounted on the tool-carrier, means whereby the tool is free to move toward and from the support,

a pneumatic impact-tool, a cylinder, a working-tool, means to limit the rearward movement of the working-tool with relation to the cylinder, an arm to which said im act tool is secured, a support on which sai arm is vertically'adjustab e, means for vertically adjustinr said arm, means whereby the working tool may be moved in horizontal planes at different levels in any direction, means whereby the angleof'the arm to the support may be varied, and'means whereby the working-tool may be maintained in a rearward positionwith relation to the cylinder independent of thesaid vertically adjusting -means or the angle of the support to the work.

6. In apparatus of the character described, an impact-tool, anarm to which said tool is secured, a support on which said arm is vertically adjustable, means wherebysaid arm is free to move longitudinally with relation to the support, said means being adapted to maintain the arm in fixed angular relation to a vertical plane passing, longitudinally through the arm, means ionvertically adjusting the arm on the support and means 7 dependent of said vertically adjusting means whereby the tool be moved to and from the Work in a vertical plane.

7. In apparatus of the character described,

.an impact-tool, an arm to which said'toolis secured, a support on which said arm is vertically adjustable, meanswhereby sa d tool is free to move toward and from the support,

said means being adapted to maintain thearm in fixed angular relation to a vertical plane passing longitudinally through the arm, means whereby the tool is free to move transversely of the support, means for vertically adjusting the arm on the support and tion of said arm may be varied from a plane Y 'rnean's independent of said vertically adjustmg means whereby the tool may be moved to and from the work in a vertical plane.

is secured, a support on which said arm is vertically ad ust-able, means for vertically to be moved longitudinally with relation to said support, means whereby the angle of the arm to the support and the angle of the arm to the work being dressed may be varied, meansv thereby the working-tool may be moved in a plane parallel to the desired whereby theworking-tool may be maintained in a" given rearward position with relation cally adjusting-means orthe angleof the support to the work. i i

9. In apparatus of the characterdescribed, a pneumatic impact-tool, a working-tool, an

arm towhich said impact-tool is secured,

a support on which said arm is vertically adjustable, and means whereby the workingtool is free to bemoved in any direction the arm on the support, and any movement of the support or the angle thereof with relation to the work.

scribed, a pneumatic impact-tool, a cylinder, a working-tool, an arm to which'said impact-tool issecured, a support on which said armis rotatably mounted and vertically adjustable, means whereby the angle of the arm to the support and the angle of the arm to the surface being dressed may be varied and means whereby the workingtool may be moved in any direction and means whereby the working-tool may be maintained in a given rearward position the vertical adjustment of the arm on the support, or the angle of the support to the wor '11. in apparatus of thecharacter deadjustable on the support, an impact-tbol mounted on the tool-carrier, means whereby the toohcarrier is free to' move longitudina with relation. to ,thesupport, said means in *iired angular relation to a vertical plane passing longitudinally through the toolcarrier, means for vertically adjusting the tool-carrier onthe support'and means independent of said vertically adjusting means work in a vertical plane.

scribed, a supportQa ltool carrier vertically mounted on the tool carrier, means whereby 8. In apparatus of the character described, pneumatic impact-tool, a cylinder, a Work i" =tool, an arm to which said impact-tool- 10. In apparatus of'the character described, a support, a tool-carrier vertically whereby the tool is free to move toward the i 12. In apparatus of the character deadjustable on thesupp'o'rt, an impact-tool" adjusting said arm, said arm being adapted a plane of the surface being dressed, and means \to the cylinder independent of. the said vertiindependent of the vertical adjustment of with relation to the'cylinder independent of ns; adapted to maintain the tool-carrier the tool-carrier is free to move longitudinally with relation to the support, said means being adapted to maintain the tool-carrier in fixed angular relation to a vertical lane passing longitudinally through the too -carrier, means for vertically adjusting the toolcarrier on the support, means whereby the tool may be moved in a vertical plane independent of said vertically adjusting means and means independent of the vertically adjusting -means whereby the tool may be maintained perpendicular to the plane of the finished surface of the work. 13. In apparatus of the character described, a pneumatic impact-tool, a workingtool, an arm. to which said impact-tool is secured, a support on which said arm is -vertically ad ustable, means for vertically adjusting said arm, means independent of the vertical adjustment of the arm on the sup ort whereby the Working-tool is free to e moved in'any direction to dress the curved surface'of a stone and means whereby .the Working-tool may 'be maintained perndicular to any portion of I the curve independent 'of the said vertically adjusting means. I

14. In apparatus of the character described, a neumatic impact-tool, a cylinder, a wor ing-tool, an arm to which said impact-tool is secured, a support on which I said arm is vertically adjustable, means whereby the arm is free to move longitudinally with relation to the support and means tool is secured, a support on which sai is vertically adjustab whereby when the machine is in operation the weight of the outer end of the arm and cylinder rests upon the working-tool in following the-inequalities of the rough surface, or in dressing surfaces of varying planes or curves, inde endent of the vertical adjustment of sai arm on the support or theangle of the support to the work.

. 15. In apparatus of the character described, a pneumatic impact-tool, acylinder,

a'Working-tool, means to limit the rearward movement of the working-tool with relation to the cylinder, an arm to which the im actarm means for vertically adjusting'said arm andmeans' whereby when the machine is in operation, the weight of the outer endv of the arm and cylinder may rest,

upon the working-tool in following the inequalities of the rough surface, or in dressing surfaces of varyin planes or curves, independent of the sai adjusting means.

16. In apparatus of the character described, a pneumatic impact-tool, a Workingtool, an armto which said impact-tool is secured, 'a support on which said arm is mount-- ed, means w ereby the outer end of the arm is free to move longitudinally of the arm to and from said support and means whereby the working-tool is free to be moved in a sacnso moved in any direction independent of the vertical adjustment of the arm on the sup port.

18. In apparatus of the character described, a support, a tool-carrier vertically adjustable on the support, an impact-tool mounted. on the tool-carrier, means whereby the tool-carrier is free to move longitudinally with relation to the support, said means bemg adapted to maintain the tool-carrier 1n fixed angular relation to a vertical plane passing longitudinally through. the tool-carrier,

means for vertically adjusting the tool-carrier on the sup ort and means independent of said vertical y adjusting means whereby the weight of the tool will move it downward toward the work.

19. In apparatus of the character described, an impact-tool, an arm to which said tool is secured, a support on which said arm is vertically adjustable, means whereby said arm is free to move longitudinally with relation to the support, said means being ada ted to maintain the arm. in fixed angular re a tion to a vertical plane passing longitudinally through the arm, means for vertically adjusting the arm on the support,.means in-- dependent of said vertically adjusting means whereby the tool may be moved to and from the work in a vertical plane and means whereby the tool may be maintained perpen dicular tothe surface of the work.

29. In apparatus of the character de scribed, an impact-tool, an arm to which said impact-tool is secured, a Working-tool, a vertical. support on which said arm may be adjusted vertically, and means independent of the vertical adjustmentof the arm on said support whereby the outer end of the arm is free to move to and from the work in a vertical plane.

21. In apparatus of the character described, an impact-tool, an arm to which said tool is secured, a su port on. which said arm is vertically adjusta le, means Wlli l'ffilflf said arm is free to move'longitudinally with relation to the support, said means being adapted to maintain the arm in fixed angular relation to a vertical plane passing longitudinally through the arm, means whereby the outer end of the arm is free to move transversely of the support, means for "z'e tically adjusting the arm on the support and l independward the work and means whereby the tool ent of said vertically adjusting means whereward toward thework.

' and means independent of the vertical ad- 1 by the weight of the tool will move it down- 22'. In apparatus of the. character described, an 1mpacttool, an arm to which said impact-tool is secured, a working-tool, a vertical support on which said arm may be adjusted vertically and moved longitudinally j-ustment of the arm on said support whereby the Wei ht of the arm and too tends to hold the wor g-tool to the work. 23. In apparatus of the character described, asupport, a tool-carrier vertically adjustable on the support, an impact-tool mounted on the tool-carrier, means whereby the tool-carrier 1s free to move longitudinally with relation to thesupport, said means he- "said vertically 1a ing adapted to maintain the tool-carrier in fixed angular relation to a vertical lane passing longitudinally through the too -car- (rier, meansfor vertically adjusting the toolcarrier on the support, means inde endent of usting means w ereby the weight of the tool will moveit downward tomaybe maintained perpendicular to the sur- 3O 5 adjustable on. the support, an impact-tool thei-toolcarrier;.is Tree to move longitudi-.

40. su port, means independent of said verti-- .face of the work being dressed; I

24. '.In apparatus. of the character de-' scribed, a support, atool-carrier vertically mounted onthe toolgcarrier, means whereby nally with relation to thesupport, said means being adaptedto maintain the toolcarrier in fixed angular r'elation'to a vertical plane passing longitudinally through the tool-carrier, means for-vertic ally adjusting the tool-carrier on the support, means whereby the tool is free toinove transversely of the ca ly adjusting means whereby the weight of the tool will move it'd'ownward toward the work and means whereby the tool maybe maintained the work be ng dressed.

- '25. In apparatus of perpendicularito the surface of he character Idescribe'd,'Ta support, a tool-carrier vertically adjustable on the support, an impact-tool mounted on the tool-carrier, means whereby the tool-carrieris free to. move longitudinally relation to-the support, said me'ans be- ,ing'adapted to maintain the.toolcarrier in fixedangular relation to avera e plane pass- 5 means or vertically adjusting the to o'l' car'- i'ng lon 'tudinally through the tool-carrier,

rier on the support, m' eans inde' endent of said vertically adjusting means "w ereby the tool may be moved to and from the work in a vertical'pl'ane and m'eans'whereby] the tool maybe adjusted to different angles with relation to the surface of the -'being "-dressedflf j @261 n- .apparatusof the character deinoved to and from the work 'in a. ve'rt al j '28. In apparatus 'limitits rearward movementwith relation to the inipact-tool and means independent'of rier on the support, whereby scribed, a cylinder and! piston, an a, ix-ts 100 which the cylinder is secured, a vertical-sup 'port on which ,the arm is vertically adjus able, a working-tool and means tolim' rearward movement with relation -to.;th

plane.

scribed, a cylinder and piston, a iwerkihg ing-tool in,a substantially fixedlpos itifqn I j y I 3, scribed, a vertical support-par tool cajn which may be adj usted verticallyron the s port and be moved longitudinallywith tion thereto, meanstor vertically-adjus g. said tool-carrier, an impact-tool incunt-ed-on"v the tool-carrier, and meanswindpenden t "of the vertical adjusting means of .thetoOl-c-ar r er on the support, whereby the:- tool .iiiay be plane. r a

27. In apparatus of the characrte scribed, a vertical support,- 'a t-eel ar-ffisr which may be adjusted verticallyronith port and be moved longitudinally with a: tion thereto, means for verticallyadju's'tihgsaid tool-carrier, an impactetoolmojuntedion the tool-carrier, and means ind-epenchant 'of the vertical adjusting means "of-the to'ol-ca'rrier on the support, whereby the weight or the tool will move it downward toward the work.

of the character described, a vertical support, a tool-carrier which may be adjusted vertically on the support and he moved longitudinally with relation thereto, means for vertically adjusting said tool carrier, an ir'npacttool mountedgon the tool-carrier, a working-tool and means to the vertical adjustingmeans at the-..tool-car-* e weight at 1 wor gthe impact-tool tends tb"hold tool in contactwiththework 29.- In apparatus. ofqthe char'ac inder and means'independent of said cal adjustment whereby the outerendeof; arm and cylinder is free to move in ajvert c l 30. apparatus of, the

,tool, means to limit the rearwardmov-em of the working-tool with relation -tp -;-the inder, an arm to whichTt-h'e cylinderis sec red, a support on which the armis; vertically I i adjustable, means for vertically-adjusting a said arm, and means independent of, said 1 vertical adjusting means, whereby. theweight; of the cylinder rests on-the workln tool and l tends to maintain the rear end lof he :wor

relation to the cylinder when the fo'rw off the workipg tool is on the work being dressed. I f

'31. In apparatus of the, scribed, a cylinder and piston, a, and means'to limititsirearward with relation t'o'the cylinder, an arnitoi nc M the cylinder is secured, a support o nfwluch n ub the arm is verticallyadjustable andlongitudmally movable, means for vertically adjusting said arm and means independent the I vertical adjusting means whereby the weight 5 of-the cyhnder rests on the working-tool and tends to hold the latter in substantially fixed 'relatlonv to the cylinder when the workingtool is in contact with thework.

= 32. 'In apparatus of the character described, a Y

I which the which. the arm '18 vertically adjustable, a working-tool and means to limit the forward movement of the cylinder with relation to the air the'support to swivelso that the outer end of the arm and the :Iylinderwfll move toward the work in a vertic plane. I i

3 3. apparatus of the character de-v scr1bed,'a cylinder and piston, a working-tool -receiving direct piston impact, said workingbe' path of t e piston when not in contact with the work,

a clamping device and means whereby the working-tool maybe tempora" 'rily clampedto the'cylinder, and retained in the path of the pistonwhen the working tool is'iifted from the work. 34, In apparatus of the character described, an impact-tool, includin a cylinder iand' pisto'n,fa tool-carrier on which the im pact-tool is -mounted, a support on which the mol carrier is vertipally adjustable, .means I for verticallyiadjus'ting the tool-carrier, "a

into the forward end of the impactetoo :means whereby the impact-toolmay be moved to and from the work in a vertical plane and a device fron'ifthe-impact-tool adapted tobe grasped bythe operator by which the workin -tool may be retained in the path of the piston. .35, In apparatus of the character de- I sli'bed, an impact-tool including acylinder and;pi'ston, a tool-carrier on which the ima e-te hs mounted, a'support on which the I I teal-carrier is vertically adjustable, means for 'verticall ,a'd'usting the tool-carrier, -a

ifij'worki'ng-too having its shank fitting loosely into the forward end of the I impact-to0 m me whereby the impact tool may be nioved-to and from the work in a vertical ,planeand means whereby the working-tool may beclamped to the impact-tool and re in thepath of the piston while the mais p ra ion nd the working tool is .not 'contact with the surface of the work.

k In apparatus of the character dc- I I an'impact-tool including a cylinder andpiston, a tool-carrier on which theimpact-tool is mounted, a support on which the ar1-'ier is vertically 'adjustable, means adjusting the tool-can -ier, a

cyllnd'erand piston, an arm tocyllnder 1s secured, a support 011 wor -tool when the latter is in contact *Wlth the work said arm being mounted on normally free to move out of the mag an retained inthe path of the piston while projecting at an angle I working-tool having its shank I fitting 130581 V mto the forward end of the impact-too means independent of the vertical adjusting means of the tool-carrier on the support whereby the impact-tool maybe moved to and from the work in a vertical plane, and means whereby the working-tool may be retained in the path of the piston-while the machine is in operation and the workingftool is not in contact with the work.

37 In apparatus of the character described, a cylinder and piston, a working-.1 tool receiving, direct piston impact, said workinpl-tmpl being normally free tomove out of t e athof the piston when not in contact witht ewor'k, a head at the forward end I of the cylinder, a. clamping-device secured to said head and adapted to engage the working-tool to retainfiit inthe head while the working-tool being" moved from'a lower-to ahigher plane on the surface of the work and means for holding said head: against the cyl-v inder by spring pressure. I I

38. apparatus of the character de-.- scribed, an 1mpactt0ol inelud' -a"-=cylinder and piston, aworking-toolreceiving direct piston impact, a tool-carrieri-o'n which the impact-tool is mounted, a su port on which the tool carrier is vertica ly adjustable, I means for vertically adjusting the tool-carrier, means whereby the cylinder may be moved to and from the work in a vertical plane and means whereby the worldng tool be lifted, from the surfaceof the work the maehinejis inoperation.

In apparatus of the character -de I scribed, a cylmder and piston, aworkihg-tool, an arm to which the cylinder is secured, means whereby the cylinder is free '130 be moved over the surface of the work, a handle connected with said arm, la ,throttle-valve ada ted tp control the zsnpply'of motive 'fluld to the cylinder and means n connection with said handle whereby'the o' 'eration -pffthe e- I throttle-valve may be contro led.

40, In apparatus of the character de'- scribed, a cylinder and piston, -a working-tool,

an arm to which the cylinder is secured, a

support on. which said arm is [adjustably mounted, a throttle-valve adapted tocontr'ol the supply of motive-fluid to thecylinder, a handle connected with the arm-to. control the movement of the latter over the surface of the work, said handle being. pivotally mounted and the outer end vertlca ly movable with relation to the arm, means to normally retain 'said handle in a rearward osition and means whereby when the han leis moved forward with relation to the arm the tive fluid to the cylinder. 7 I

41. In apparatus of the character de-' scribed, a cyhnder and piston, aworking-tool.

throttle-valve will be'unseated to suppl mo- 125 eoasac support on which the arm is adjustably tically adjustable t "mounted, means whereby the outer end of the armis free to be moved to and from the support, a throttle-valve adapted to control the supply of motive fluid to the cylinder, means to normally retain the throttle-valve in seated osition, a handle connected with said arm 7 y means of which the workingtool maybe guided on the surface of the work,-the outer end of said'handle-being vertically movable with relation to the arm and means whereby the operation of the throttlevalve may be controlled by said handle.

42. In apparatus of the character described, a vertical su port, a tool-carrier verereon, 'said tool-carrier being free to move longitudinally with relation to the support, means for vertically adjusting the tool-carrier on the support, an impact-tool adjustably mounted on the tooloarrier,.'means independent of the vertical adjusting means of the tool-carrier on the support, whereby the tool may be moved to and from the work in a vertical'plane' and means to .vary the angular adjustment of the tool. on' the tool-carrier.

43.111 T'apparatus of the character. described, a support, a tool-carrier vertically adjustable on. the support, an impact-tool ad ustably mounted on the tool-carrier, means whereby the tool-carrier is free to move longitudinally with relation to the support, said means bein adaptedto maintam the tool-carrier in ed angular relav tionto a vertical lane passing longitudinally through the too carrier, means for vert1- cally adjusting the tool-carrier on the sup port,v means independent of said vertically adjusting means whereby the tool may he moved to and from the work in a vertical plane and means controlled by the operator,

to adjust the tool on the tool-caririerwhile the machine is in operation.

44. In apparatus of the character de scribed, a support, a tool-carr1er vertically adjustable. on the support, an im act-tool ad ustabl mounted on the too -carrier,

means wereby the tool-carrier is free to move longitudinally with relation to the support, said means being adaptedto maine scribed, a su' port, a toolcarrier vertically adjustable o the support, an impact-tool ad ustablyfimounted on the tool carrier, waerehy the tool-carrier is free to machine is in operation.

an impact-tool adjustably' mounted on the arm under adjustable tension to normally trolled by the operator whereby the angular adjustment of the tool may be varied while the machine is in operation.

47. In apparatus of the character described, a support, a tool-carrier vertically adjustable on the support, an impactetool .adjustahly mounted on the tool-carrier,

means whereby the tool-carrier is. free to move longitudinally with relation to the support, said meansbeing adapted to main tain the tool-carrier in fixed angular relation to a vertical plane passing longitudinally through the tool-carrier, means for vertically adjusting the tool-carrier" on the support, means independent of said vertically retain the toolin position and means con- 7 adjusting means whereby the tool may be moved to and from the work in a vertical plane, means to normally retain the tool in position on the tool-carrier and means controlled by the operator-whereby the angular adjustment of the tool may be changed while the machine is in operation.

48.. In apparatus of the character scribed,'a support, an arm'mounted thereon, an impact-tool adjustably mounted on the arm, meansv to normally retain the, tool in position under adjustable spring tension and allow the angular adjustment of the tool to be varied in a lateral direction while the I 49. In apparatus of the character described, a support, an arm mounted thereon, an impact-tool mounted on said arm, means to vary the angular adj'ustment'of the tool thereon in a forward and backward direction while the machine is in operation, said means being adapted to positively retain .the tool in adjusted position, and means whereby the angular adjustment of theitool' maylbe varied 'in a lateral direction and normally retained in adjusted position under spri g tension.

50. In apparatus of the character described, a support, a tool-carrie mounted thereon, an impact-tool mounted on ft e tool-carrier, means to vary the angular ad justment of the tool thereonwhile the tool scribed, a support, a tool-carrier mounted.

is in operation, said means including a swivel under spring tension.

51. in apparatus of the character deand piston, a tool-carrier to which the tool is secured, a support on which the tool-carrier is mounted, a working-tool receiving direct piston impact, means to limit the rearward movement of the working-tool with relation to the cylinder, and means whereby the working-tool may be retained in the path of the piston when the machine is in operation and the working-tool is not in contact withthe work;

53. In apparatus of the character described, an impact-tool including a cylinder and piston, a tool-carrier to which the tool is secured, a support on which the tool-carrier is mounted and longitudinally movable with relation thereto, a working-tool receiving direct piston impact, means to limit the rearward movement of the working-tool with relation to the cylinder, means. whereby the working-tool may be moved over the surface of the work when it is in contact therewith, and means whereby the working-tool may be retained in the path of the piston when the machine is in operation and the working-tool is not in contact with the work.

54. In apparatus of the character described, a cylinder and piston, a workingtool, an arm to which the cylinder is secured, means whereby the cylinder and workingtool are free to be moved over the surface of the work, a handle connected with said arm, the outer end of the handle being vertically movable with relation to the arm, a throttlevalve adapted to control the supply of motive fluid to the cylinder and means whereby the operation of the throttle-valve may be controlled by said handle.

55. In apparatus '.of the character described, a cylinder and piston, a workingtool, an arm to which the cylinder is secured, meifns whereby the cylinder and workingtoo the work, a handle connected with said arm, the outer end of the handle being vertically movable with relation to the arm, a throttle valve adapted to control the sup ly of motive fluid to the cylinder, means whereby the operation of the throttle valve maybe controlled by 'the vertical movement of said ban- -the tool-carrier is mounted,

are free to be moved over the surface of tool are free tobe moved over the surface of the work, a handle connected withlsaid arm, the outer end of the handle being vertically movable with relation to the arm, athrottlevalve adapted to control the supply of motive fluid to the cylinder, means wherebythe operation of the throttle-valve may'be'controlled by the vertical movement of said handle with relation to said arm, an adjustable stop adapted to limit the downward movement of the handle and means to retain said stopin adjusted position.

57. In apparatus of the character described, a cylinder and piston, a working tool, an arm to which the cylinder is secured, means whereby the cylinder and workingtool' are free to be moved over the surface of the work, a handle connected with the cylin 'der adapted to engage the working-tooland means whereby the working toolf may be kept in alinement with any edge of the surface when the arm is moved to difierent por tions of the surface.

58. In apparatus of the character described, a cylinder and piston, a workingtool,.an arm to which the cylinder is secured, means whereby the cylinder and workingtool are free to. be moved over the surface of the work, a handle connected with the cylinder and normally in alinement with said arm, adapted to engage the workingtool, and. means whereby the handle may be swiveled with relation to said arm to keep the Working-tool in alinement with any edge of the surface when'the arm is moved to different. positions on the surface.

59. In apparatus of the character described, an impact-tool, a tool-carrier to which the tool is secured, a support on which a Working-tool,

means whereby the working-tool is free to be moved over the surface of the work, a device retained in operative relation to the workingtool when the latter is moved to different positions on the surface of the work and means whereby the working-tool may be engaged by said device and be maintained in alinement with any edge of the surface when it is moved to difierent portions of the surface.

' 60. In apparatus of the character de scribed, an impact-tool, a tool-carrier to which the tool the tool-carrier is mounted,

moved over the surface of the work, a device retained in operative relation to the working-- tool' when the-latter is moved to different po-f is secured, a support on which a working-tool, means whereby the working-tool is free to be- 906,850 sitions on the surface of the work, means In testimony whereof I affix my signature,

whereby the working-tool may be engaged in presence of two witnesses. by said device and means whereby the device may be swiveled with relation to the tool- GEORGE A 5 carrier to maintain the working-tool:- in aline- Witnesses:

ment gvith any edge of the surface being 7 GEORGE H. BROWN,

dresse CHARLES H. WILSON. 

